<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>label标签</title>
</head>
<body>
   <label for="text"> 用户名：</label>  <input type="text" id="text"> <br>
   <input type="radio" id="nan">  <label for="nan">男</label>
   <input type="radio" id="nv">  <label for="nv">女</label>
</body>
</html>